Combination cup and plunger oil well pump



'0t.2o,1936. F- VWLCOM 2,057,754

COMBINATION CUP AND PLUNGER OIL WELL PUMP Oct. 20, 1936. F. WlLcoM COMBINATION CUP AND PLUNGER OIL WELL PUMP Filed oct. 3, i954 2 sheets-sheet? Patented Oct. 20, 1936 cnrs STATES PATENT OFFICE COMBINATION CUP AND PLUNGER OIL WELL PUMP 1 Claim.

This invention relates to oil well pump con- Y struction, and aims to provide an oil well pump of the combination cup and plunger type which will be absolutely sand proof.

Another important object of the invention is to provide a pump of this character having means for cleaning the valves of sand and other foreign matter, whereby the valves may be readily and easily pulled.

Another object of the invention is the provision of means so that a quantity of oil will be forced upwardly between the working barrel and plunger in a spiral spray, whereby the sand and grit will be forced through the valves with each stroke of the pump, eliminating any possibility of the sand and grit iinding its way back into the pump.

A further object of the invention is to provide scraping means at the upper end of the plunger, adapted to scrape all sand and grit from the 20 inner surface of the working barrel, thereby permitting the entire pumping operation to be carried out by the plunger, the cup picking up the slippage and insuring a perfect fluid seal for the plunger, at all times.

A still further object of the invention is to provide a pump which may be placed into a well without pulling the tubing from the well, and without the necessity of removing the old pump.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described andI claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Figure 1 is a longitudinal sectional View through the pump tubing and a pump constructed in accordance with the invention, the View illustrating the upper end of the pump.

Figure 2 is a longitudinal sectional View through the pump tubing and that portion of the pump directly under the upper section of the pump shown by Figure 1.

Figure 3 is a longitudinal sectional view through the pump tubing and that portion of the pump directly under the section of the pump illustrated by Figure 2 of the drawings.

Figure 4 is a longitudinal sectional view through that portion of the pump tubing and pump forming a continuation of the tubing and pump section illustrated by Figure 3 of the drawings.

Figure 5 is a longitudinal sectional view through stem which is provided with a threaded upper extremity 6 to which the main pump rod is connected, in the usual and well known manner.

The lower end of the connecting rod 5 is slightly enlarged and is formed into a valve cage 'I in which the ball valve 8 is housed, the ball valve being adapted to move throughout the length of the valve cage during the pumping operation allowing oil to pass into the pump.

As clearly shown by Figure 1 of the drawings, the lower end of the valve cage is formed with internal threads by means of which the connecting rod is connected with the coupling 9, which in turn has threaded connection with the working barrel I9 which extends to a point near the bottom of the well.

At the lower end of the working barrel I0 are internal threads which cooperate with the threads formed at the upper reduced end of the working barrel bushing I I, the working barrel bushing I I being provided with a spirally formed groove I2 which has its upper end communicating with the fluid cavity or passageway I3, formed between the working barrel and plunger I4.

Removably mounted between the coupling 9 and lower extremity of the valve cage I, is a valve seat I5, against which the valve 8 moves and seats, during one stroke of the pump.

The working barrel houses the plunger which comprises an upper tubular section I6, which closely ts within the working barrel, the upper extremity of the upper tubular section IS being beveled, providing a knife-like edge adapted to scrape the inner surface of the Working barrel, with each stroke of the pump, removing sand and grit therefrom, which would otherwise collect and retard movement of the working barrel over the plunger.

Secured within the lower end of the plunger I4, by means of a threaded connection, is a coupling Il that has inwardly extended end portions I8 that provide a guard for the ball valve I9 that operates in the valve cage 20 connected to the lower end of the coupling I'I.

The ball valve i9 engages the valve seat 2l which is held between the valve cage 2U and the' pumping tube 22, which has threaded connection withfthe valve cage 2B.

The pumping tube provides a support for the cups 23 that closely engage the inner surface of the working barrel i9, the cups being held in spaced relation with each other, by means of the spacers 24. The lower end of this section of the pumping tube is threaded to receive the nut 24, which engages the lowermost cup 23, holding the cups in position. y

The lower section of the pumping tube isindicated by the reference character 25, and has its upper end threaded within the lower end of the coupling 26, which is secured to the lower end of the adjacent upper pumping tube section 22.

Disposed at the lower end of the pumping tube section 25, is a coupling 2l, which has inwardly extended portions 28 providing a stop for the ball yvalve- 29 that operates in the valve cage 3U. The ball-.valve seats on the valve seat 3l, which is held between the standing valve 32 and the valve cage 30.

Valve cups 33 form a part of the standing'valve 32, the cups being disposed towards each other, and held in proper relation with respect to each other, by means of the rings Sli; Spacers 35 are disposed between each set of cups, to hold the cups in their proper positions.

Carried at the lower end of the standingvalve, is a nut 36,"which is formed with openings 3'! through which oilpasses into the pump, when the pump is in operation.

` It will ofcourse be understood that the pump structure is supported within the pump tubing indicated at 38,-the lower section oi the pump tubing 3S being spaced from the'valve cage 30 and coupling 2l, so that oil may pass upwardly into the space at the lower end of thek working barrel diconnecting rod 5, whereupon the pump may be lowered through the tubing to the bottom of the well without the necessity of removing the old pump, the lower valve passing into the old working barrel, making a perfect seat and holding the stationary valves against movement while the outer tubel or working barrel reciprocates up and down, drawing in fluid on the up stroke, and discharging fluid and sand into the tube on the down stroke.

With each movement of the working barrel, uid is forced through the spiral groove l2 and discharged into the fluid cavity directly thereabove, in a spirally-formed spray, causing the sand and grit to be dislodged and agitated at all times, preventing the settling of the sand and grit, to retard or prevent the removal of the pump.

It willv of course be understood that as the working barrel Il] reciprocates over the plunger lli, oil is forced upwardly through the plunger and working barrel operating the valves i 9 and 8 with each stroke of the working barrel.

Having thus described the invention, what is claimed is:

A combined cup and plunger oil well pump, comprising a pump tubing, a pumping tube operating within the pump tubing and in spaced relation with the pump tubing, pump valves and valve cups mounted on the pumping tube, a working barrel operating between the pump tubing and pumping tube, a bushing secured to the lower end of the working barrel and contacting with the pumping tube, said bushing supporting the working barrel ink spaced relation with the pumping tube, providinga vertical passageway between the pumping tube and working barrel, said bushing having a spirally formed groove in the inner surface thereof communicating with the vertical passageway and forming a spiral passageway with 'the pumping tube, and said spiral passageway adapted to deliver liquid to the vertical passageway in the form of a 'swirling spray when the working barrel is operated.

FRANK WILCOM. 

